71 
METABOLISM EXPERIMENT NO. 25. 
Suhjvft. — J. F. 8., a chemist, 29 years of age, weighing with under- 
clothing about 61 kilograms (111 pounds). 
Occupation during experiment. — Reading, writing, and miscellaneous 
observations with the apparatus, with as little muscular activity as was 
practicable. 
Duration. — Three days, beginning at 7 a. m. January 23, 1900. The 
usual preliminary period of 1 days duration preceded the metabolism 
experiment. The subject entered the calorimeter on the evening of 
January 22, thus spending four nights and three days in the respira- 
tion chamber. 
Diet. — Inasmuch as experiment No. 25 was the first with this sub- 
ject, the experiment was somewhat of a preliminary nature. The 
average food consumption of the subject had been determined by pre- 
liminary tests, and the diet was so arranged as to furnish approxi- 
mate^ the nitrogen and the energy it was believed the subject required. 
It was intended to make this the first of a series of three experiments, 
in which about one-fifth of the energy of the diet should be furnished 
by isodynamic amounts of different materials. Unfortunately an acci- 
dent to some of the machinery necessitated the stopping of the experi- 
ment shortly after the close of the first of the series of experiments. 
The diet consisted of a so-called basal ration furnishing about 110 grams 
of protein and 2,391 calories of energy, to which was added 63 grams 
of butter daily, furnishing 1 gram of protein and 505 calories of energy. 
The kinds and quantities of food served for each meal and the quan- 
tity of drink consumed at different periods of the day are as follows: 
Table 81. — Diet in metabolism experiment No. 25. 
FOOD. 
Food materials. 
Breakfast. 
Dinner. 
Supper. 
Total. 
Beef 
Grams. 
30 
35 
300 
90 
25 
10 
Grains. 
55 
35 
300 
120 
Grams. 
Grams. 
85 
Butter 
28 
400 
90 
25 
35 
10 
98 
Milk 
1.C00 
Bread 
300 
Parched cereal 
50 
Ginger snaps 
35 
70 
Sugar 
20 

DRINK. 
Time. 
Water. 
Time. 
Water. 
Breakfast 
drams. 
100 
200 
200 
300 
10.30 p. m 
Total for day 
Grams. 
100 
10.00 a. m 
900 
3.00 p. m 
9.00 p. m 
